JP2008150122A - Belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt conveyor stabilized in travelling of a belt without applying useless tension to a conveying belt. <P>SOLUTION: The endless conveying belt 4 structured of a magnetic belt is rotatably stretched around returning members 3 and 3' provided in a frame 1, and the conveying belt is attracted and moved by a driving rotary member 5 comprising an attractive function. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a belt conveyor, and more particularly to a drive mechanism that rotates a conveyor belt.

  In the linear conveyor belt conveyor, the conveyor belt drive system is such that an endless conveyor belt is wound around tail rollers attached to both sides of the frame, and a part of the conveyor belt is wound around the outer peripheral surface of the drive pulley. In this method, the belt is rotated in the circumferential direction by the frictional force with the outer peripheral surface of the drive pulley. And it is classified into a head drive type, a center drive type, etc. by the position where a drive pulley is arrange | positioned (for example, refer patent document 1).

By the way, since the rotation of the conveying belt in the belt conveyor is performed by the frictional force with the outer peripheral surface of the drive pulley, in order to increase the frictional force, the contact range (winding range) of the belt with the outer peripheral surface of the drive pulley. In order to increase the contact pressure and further increase the contact pressure, the conveyor belt is squeezed with a snap roller, and a predetermined tension is applied to the belt. That is, in the conventional belt conveyor, belt tension is indispensable.
However, when oil, water, powder, etc. adheres to the conveyor belt and adheres to the drive pulley, the contact friction force with the conveyor belt decreases, thereby reducing the rotational transmission force to the conveyor belt. There is a problem that the rotation of the conveyor belt becomes unstable.

In order to solve the above-mentioned problem, the applicant of the present invention holds the transport belt between the rotating bodies having an attracting force by the magnetic force arranged above and below, and moves and rotates the transport belt by the movement of the vertical rotating body. The invention configured as described above has been proposed in Japanese Patent Application No. 2005-185129.
In this invention, since the conveying belt is sandwiched from above and below by the rotating body, the position of the sandwiching is the forward path side or the backward path side, and in any case, one rotating body appears on the upper side or the lower side of the conveying belt. It is necessary to consider the installation location.

Further, Patent Document 2 proposes a belt moving mechanism in which a belt has a function of a driving unit and does not require a driving motor or a reduction gear group.
This is provided with a magnetic part in which N poles and S poles are alternately arranged at regular intervals in the longitudinal direction on a belt, and a coil (stator) that generates magnetism by energization is arranged in the vicinity of the belt. By energizing the belt, the belt is moved based on the magnetic field generated by the coil.

However, the belt moving mechanism described in the cited document 2 checks whether the belt pole is the N pole or the S pole in order to excite the coil (stator) corresponding to each magnetic pole of the magnetic part of the belt at the time of starting. The sensor for this is required, the energization control is complicated, and the control part for that is required. The magnetic part of the belt must be alternately magnetized with N poles and S poles, and it takes time to manufacture the magnetic parts.
Further, the coil (stator) has a low torque, and there is a problem that the apparatus becomes large in order to obtain a torque necessary for moving the belt.

JP 2000-255737 A JP 2001-187624 A

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a belt conveyor that realizes stable belt running with the minimum necessary tension for the conveyor belt. It is in.
Another object of the present invention is to provide a belt conveyor that can ensure stable rotation even when oil, water, powder or the like adheres to the conveyor belt.
It is another object of the present invention to provide a belt conveyor that can be arranged without worrying about the space above or below the conveyor belt.

In order to solve the above-mentioned object, the technical means taken by the present invention is to rotatively wrap an endless conveyance belt formed of a magnetic belt over a folded member laid on a frame, It is characterized in that it is attracted and rotated by a drive rotating member having an attracting function by magnetic force (Claim 1).
Examples of the folding member provided on the frame include a roller (tail roller), a flat plate (knife edge) and the like generally used in a belt conveyor.

  According to the above means, the conveying belt is adsorbed to the drive rotating member having the adsorbing function, and the adsorbing conveying belt is moved together while being adsorbed as the driving rotating member is driven to rotate. Thereby, the conveyor belt can be continuously rotated by rotating the drive rotating member.

The magnetic belt constituting the conveyor belt may be anything that can be adsorbed by the drive rotation member and magnetic force. For example, a magnetic body (magnet or metal material adsorbed to the magnet) is built in the belt, On the other hand, the drive rotating member is arranged on the outer peripheral surface of the endlessly rotating rotation band with a magnetic material (magnet or metal material adsorbed to the magnet) that generates an attracting action on the conveying belt at intervals in the circumferential direction. (Claim 2).
The magnetic belt is not limited to a type incorporating a magnetic body, but may be any form such as a form in which the magnetic body is disposed on the surface of the belt or a form in which the magnetic body is mixed (kneaded) with the material constituting the belt. The magnetic belt is formed, for example, by mixing a magnetic material into a synthetic resin material or rubber material, and after molding, the N pole and the S pole are alternately magnetized along the circumferential direction using a magnetizer, or the N pole or S pole is used. Formed by magnetizing poles. In short, for the magnet attached to the drive rotating member, the magnetic belt may be magnetized as long as it is a pole that attracts it. Further, the region containing the magnetic material may be any of the entire width in the width direction of the conveying belt, or a partial region in the width direction (the center portion, both sides in the width direction, etc.).
In addition, as the rotation band constituting the drive rotation member, a member having little expansion and contraction and little elastic deformation, for example, a timing belt, a chain, a steel belt, or the like can be used.

  According to the above means, since the conveying belt is constituted by the magnetic belt incorporating the magnetic material, a roller or a flat plate that is generally employed today can be used as the folding member to be laid on the frame. . Then, the magnetic body (magnet or metal material adsorbed to the magnet) fixed to the outer peripheral surface of the rotation band is adsorbed to the magnetic body incorporated in the conveyor belt, and the movement of the magnetic body accompanying the rotation of the rotation band The conveyor belt can be rotated.

The magnetic body is configured such that a magnet holder containing a magnet or a metal material adsorbing to the magnet is attached to the outer surface of the rotation band at intervals in the circumferential direction (Claim 3).
The method of attaching the holder containing the magnet or metal material to the rotation band may be any of a fitting method, a screwing method, an adhesion method, and the like that can be attached to and detached from the rotation band. Moreover, the magnet attached to the rotation band is made by alternately arranging N poles and S poles, or only N poles or S poles, and further a metal plate or the like that is attracted to the magnets.

  According to the above means, since the drive rotating member is configured by attaching the magnet or the holder containing the metal material adsorbing to the magnet to the rotation band, a general-purpose product can be used for the rotation band, and the cost can be reduced. Can be reduced. And when the holder which incorporated the magnet was made into the attachment system which can be attached or detached, replacement | exchange of a holder can respond with respect to damage of a magnet. Further, the driving force can be adjusted by increasing or decreasing the number of holders.

  Further, the position where the drive rotating member is arranged, that is, the surface on which the drive rotating member is attracted is the front side surface (outer side surface) or back side (inner side surface) of the conveyor belt, and the return side surface (outer side surface) or back side. (Inside surface) may be used, but it may be disposed between the forward path side and the backward path side so as to be attracted to the rear surface on the forward path side and / or the rear surface on the backward path side.

  According to the above means, the drive rotation member is disposed between the forward path side and the backward path side of the conveying belt, so that the driving means and the like protrude from the forward path surface (upper) and the backward path surface (lower) of the conveyor belt. Without being restricted by the installation location. In addition, when the drive rotating member is disposed between the forward path side and the return path side of the transport belt and the drive rotary member is attracted to both the back path back surface and the back path side rear surface of the transport belt, the suction location is approximately Therefore, when the same driving force as that of single-sided suction is obtained by double-sided suction, the length (circumferential length) of the rotation band of the drive rotating member can be set short.

The belt conveyor according to the present invention is a system in which the belt is adsorbed and moved by the configuration according to claims 1 and 2 as compared with the conventional system rotated by transmission of frictional force. Therefore, the belt tension is not required, and therefore the belt is not easily damaged, and a belt conveyor capable of stable belt running over a long period of time can be provided.
In addition, because the conveying belt is attracted and transferred by the magnet-to-magnet attracting action or the magnet and metal plate attracting action, a stable attracting state can be established without being affected by water or oil adhering to the transporting belt. , Stable belt running can be established.

Further, according to the third aspect of the present invention, it is possible to easily configure the drive rotating member by utilizing the rotation band of a general-purpose product, and it is possible to reduce the cost. And since it can respond to the damage of a holder by replacement | exchange of the holder of an applicable location, it is very economical.
Furthermore, since the drive means does not protrude above and below the conveyor belt, the layout can be adapted to any layout without being restricted by the installation location.
The magnetic part of the belt in the cited document 2 must be alternately magnetized with N and S poles, but the conveyor belt of the present application magnetizes either the N pole or the S pole. It can be manufactured at low cost, and troublesome energization control is not required.

Hereinafter, an example of an embodiment of a belt conveyor according to the present invention will be described with reference to the drawings.
FIG. 1 shows a belt conveyor A equipped with a drive system according to the present invention, in which a horizontally long frame 1 is horizontally cantilevered by a support member 2 having an L-shaped cross section, and the frame 1 has a machine length direction (longitudinal direction). A tail roller 3 and an auxiliary roller 3 ′ as folding members are rotatably supported on both sides, and an endless conveying belt 4 made of a magnetic belt is wound around the tail roller 3 and the auxiliary roller 3 ′ on both sides. Has been.
A drive rotation member 5 that rotates endlessly and generates an adsorption action with the conveyance belt is disposed between the forward path side 4 a and the return path side 4 b of the conveyance belt 4. The conveyance belt 4 is sucked and rotated, and the article to be conveyed W placed on the forward path side 4a is conveyed.

  The frame 1 is supported by a cantilever support member 2 having an L-shaped cross section so that the conveyor belt 4 attached around the tail roller 3 and the auxiliary roller 3 ′ on both sides of the frame is attached to the support member 2. It becomes possible to pull it out on the opposite side, and the conveyance belt 4 can be easily removed and replaced. The support of the frame 1 is not limited to the cantilever structure shown in the figure, but may be a double-supported structure that has been generally adopted from the past.

  Of the tail roller 3 and the auxiliary roller 3 ′ of the folding member attached to both sides of the frame 1 in the machine length direction, the auxiliary roller 3 ′ disposed on the lower edge side of the frame 1 is attached so as to be movable and adjustable in the machine length direction. The tail roller 3 and auxiliary roller 3 ′ on one side (left side in the drawing) are mounted on an auxiliary frame 7 that is rotatably attached to the frame 1 via a connecting plate 6. As a result, when the auxiliary frame 7 is rotated upward with respect to the connecting plate 6, the conveyance belt 4 is slackened, and the conveyance belt 4 can be pulled out to the side opposite to the support member 2. The folding member is not limited to the configuration using the tail roller 3 and the auxiliary roller 3 ′ as shown in the drawing, but may be configured by one tail roller. In this case, the distance between the forward path and the backward path is driven. It is necessary to have an outer diameter that can secure an interval sufficient to accommodate the rotating member 5.

  The conveying belt 4 is configured such that a magnetic body 8 is built in a substantially central position in the width direction along the circumferential direction in a synthetic resin belt that suppresses expansion in the circumferential direction and the width direction. At least the inner peripheral surface side (the surface facing the drive rotating member) of the magnetic body 8 is alternately magnetized with N and S poles along the circumferential direction. This magnetic material can be magnetized by forming a belt containing magnetic powder and then passing the magnet through a well-known structure, so that the N and S poles can be alternately magnetized. Can do.

  The drive rotation member 5 that sucks and rotates the conveying belt 4 has a magnet 10 on the outer surface of a rotation band 9 formed of a toothed belt (timing belt) having a tooth portion protruding from an inner peripheral surface. Are attached at a constant pitch in the circumferential direction. The drive rotating member 5 is attached to the support member 2 that supports the frame 1 through a drive toothed pulley 11 and a driven toothless pulley 11 ′ supported via a bearing, and is attached to the drive tooth. The pulley 11 is configured to endlessly rotate by driving. The driven toothless pulley 11 'may be a toothed pulley.

The magnet 10 is attached to the rotating band 9 by incorporating a rectangular flat magnet 10 in a synthetic resin magnet holder 12, and the magnet holder 12 is fixedly fixed to the rotating band 9 using a fixing bracket 13.
As shown in FIGS. 3 and 5, the magnet holder 12 containing the magnet 10 is formed in a plate shape having a length across the width direction of the rotation band 9 by a synthetic resin material, and both side portions in the length direction on one side surface thereof. The protrusions 12a and 12b constituting the insertion grooves into which the rotating band 9 is inserted are formed to protrude. And since convex part 12a, 12b which comprises an insertion groove attaches or detaches this magnet holder 12 with respect to the rotation belt | band | zone 9, the groove | channel of one convex part 12a is substantially double the depth of the groove | channel of the other convex part 12b. Is formed. Therefore, in a state where the rotation band 9 is sandwiched between the convex portions 12a and 12b, the rotation band 9 and the magnet holder 12 can move relative to each other in the width direction of the rotation band 9. Therefore, in order to fix and hold the magnet holder 12 so as not to move with respect to the rotation band 9, after inserting the rotation band 9 into the convex portion 12a forming a deep groove, the fixing bracket 13 is inserted from the outside and extra. It is configured to fill a large space.

  Further, the insertion groove formed by the convex portions 12a and 12b is a groove into which a tooth portion of the rotation band 9 is fitted, and thereby the magnet holder 12 is configured not to move in the circumferential direction with respect to the rotation band 9. Has been. The convex portions 12a and 12b have widths that do not hinder the rotation of the rotating belt 9 with respect to the pulley 11 with drive teeth and the pulley 11 ′ without driven teeth. The convex portions 12a and 12b have the pulleys 11 with driven teeth and the driven teeth. By engaging with the side edge of the pulley 11 ′ having no gear, the rotation band 9 is prevented from coming off from the pulley 11 ′ having driving teeth and the pulley 11 ′ having no driven teeth.

  The drive mechanism for driving the pulley 11 with drive teeth is a motor 14 and a known power transmission mechanism (gear train, belt transmission, chain transmission, etc.) for transmitting the rotation of the motor 14 to the shaft of the pulley 11 with drive teeth. 15.

In the belt conveyor A configured as described above, the N pole and the S pole are alternately magnetized along the circumferential direction on the inner peripheral surface of the conveyor belt 4, and the outer periphery is positioned at a position facing the inner peripheral surface. A drive rotating member 5 that is fixed on the surface of the magnet 10 and rotates endlessly by a motor 14 is disposed in the vicinity. Thereby, the conveying belt 4 is attracted to the magnet 10 of the drive rotating member 5, and when the rotating belt 9 is rotated by the rotation of the motor, the attracted conveying belt 4 is also moved and rotated together. The transported object W placed on the forward path side 4a is transported.
Further, the adsorption of the conveyance belt and the drive rotation member is stabilized by the adsorption of the magnets, and the conveyance belt 4 can be prevented from meandering.

The present invention is not limited to the above-described embodiment, and can be appropriately changed without changing the gist of the invention.
(1) In the illustrated embodiment, the magnet of the drive rotating member is attracted to the inner peripheral surface on the return path side, but may be configured to be attracted to the inner peripheral surface on the forward path side.
(2) A plurality of drive rotating members may be arranged.
(3) In the illustrated embodiment, the conveyance belt and the drive rotation member are attracted to each other, but the magnet and the magnetic material may be attracted.
(4) The magnetic poles of the transport belt and the drive rotating member are arranged alternately in N and S poles. However, all of the magnets on the drive rotating member side are magnetized on the transport belt side to the N or S poles. The pole may be a magnet opposite to the pole on the conveying belt side.

The partially notched front view which shows an example of implementation of the belt conveyor which concerns on this invention. FIG. The expanded longitudinal cross-sectional view which follows the (3)-(3) line | wire of FIG. FIG. 6 is a partially cutaway enlarged front view showing a suction state of a conveying belt and a drive rotating member. The disassembled perspective view which shows the structure of a drive rotation member.

Explanation of symbols

A ... Belt conveyor W ... Conveyed object 1 ... Frame 3 ... Tail roller (folding member)
3 '... auxiliary roller (folding member) 4 ... conveyor belt 5 ... drive rotating member 8 ... magnetic body built in the belt 9 ... rotating belt 10 ... magnet

Claims (4)

  An endless conveying belt composed of a magnetic belt is rotatably wound around a folding member laid on the frame, and the conveying belt is adsorbed and rotated by a drive rotating member having an adsorption function. A characteristic belt conveyor.   The conveying belt includes a magnetic body in the belt, and the driving rotating member has a circumferentially spaced magnetic body that generates an attracting action on the magnetic body of the conveying belt outside a rotating belt that rotates endlessly. The belt conveyor according to claim 1, further comprising:   The said magnetic body is comprised by attaching the magnet holder which incorporated the metal material which adsorb | sucks with respect to a magnet or a magnet to the outer surface of a rotation belt at intervals in the circumferential direction. Belt conveyor.   The belt conveyor according to any one of claims 1 to 3, wherein the drive rotation member is disposed between a forward path side and a return path side of the conveyance belt.

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